Library of Congress – Digital Collections
A collection of more than 171 million items includes more than 40 million cataloged books and other print materials in 470 languages; more than 74 million manuscripts; the largest rare book collection in North America; and the world’s largest collection of legal materials, films, maps, sheet music and sound recordings.
Smithsonian Online Virtual Archives
The Smithsonian Online Virtual Archives (SOVA) provides integrated access to descriptions and detailed inventories of thousands of primary resource collections maintained by archival units across the Smithsonian.